
#include <iostream>


typedef void (*task) (); 


void task1()
{
    std::cout << "执行任务1" << std::endl;
}
void task2()
{
    std::cout << "执行任务2" << std::endl;
}
void task3()
{
    std::cout << "执行任务3" << std::endl;
}
void task4()
{
    std::cout << "执行任务4" << std::endl;
}